Honestly, your relationship seems to be one problem after the other. He is being unfaithful when he is texting other girls in that manner. You don't trust him (rightfully so). He doesn't sound at all interested in any real commitment. This really isn't going to get better. Are you willing to keep going through this stress and heartache? If it were me, I wouldn't put up with it anymore. What you do though is obviously up to you.